Railway friction draft rigging



'tionelements.

entree stares QFFZQE,

WILLIAM H. MINER, oronnzr; NEW roan, annaonn enemies, or CHICAGO,

' ILLINOIS; slim ocornvoa assrenon wo sen) MINER.

RAILWAY FRICTION DRAFT RIGGING.

Application filed December 22, 1819.

To all whom it may concern Be it known that we, WILLIAM H. MINER and JOHN F. ()"CONNOR, citizens of the United States, residing at Chazy, Clinton County, New York, and Chicago, Cook County, Illinois, respectively, have invented a certain new and useful Improvement in Railway Friction Draft Rigging, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming apart of this specification.

This invention relates to improvements in railway friction draft rigging.

The object of theinvention is to provides. railway friction draft rigging having high capacity and with those parts of the mechanism having the shorter life, exposed for easy application and repair.

In the drawing forming a part of this specification, Figure 1 is a longitudinal horizontalsectional view of a portion of a railway draft rigging having our improvements embodied therein. Figure 2 is a transverse sectional View taken substantially on the line 2-7-2 of Figure 1. Figure 3 is a vertical longitudinal sectional view taken substantially on the line 33 of Figure 1. Figure 4 is a part sectional and part end elevational viewillustrati-ng one of the movable fric- In this Figure, the draft sill is. shown in section and the other parts in elevation. And Figure 5 is a detail perspectiveof one of the combinedfriction and compression columnblocks.

draft or center sills of a railway car of well known form andarrangement. A portion of a draw;baris indicated at 11, the same being peratively connected to a preferably cast yoke 12, .the yoke and draw bar being connected by the coupler key-13.

In carrying out ourinvention, a pair of stops or abutments 14 and 15 is provided on the inner face ofeach draft sill 10. Onthe outer side of each draft sill 10 another pair of stops Or ,abutments 16 and 17 is provided, the latter being spaced apart more thanthe in'sidepair of stops 14l15. The draft sills are also centrally perforated or cut away as indicated at. 187-518 and through theopenings thus-provided are extended blocks, designated generally .bywthe. reference A, one

of the same being shownindetail in Fig ure 5 Specification of Letters Patent.

Patented May 16, 1922.

- Serial No. 3%,658.

There are two blocks A of similar construction so that a description of one will suffice. Each block A is provided on its outer end with a plate-like flange 19 of substantially rectangular outline and inwardly thereof has a substantially rectangular hollow shank 20, the latter corresponding in sizev and shape to the opening 18. The lengths of the shanks or abutments 20 are made such that the two blocks A will abut centrally of thedraft riggingasclearly indicated in Figure 2 and'when the flanges 19 thereof are just in contact with the webs of the channel draft sills. With this arrangement it will be evident that the two blocks A-A together constitute a column adapted to resist compression and hence prevent any tendency of the draft sills tobe bent or buckled inwardly as a result ofthe friction pressure hereinafter described. a

The length of the rectangular shank 20of each block A corresponds to the distance betweenthe inner pair of-stops 14 and 15 so that the blocks A are thereby held against longitudinal movement. Similarly the length ofv each, flange 19corresponds substantially to the distance between the outer pair of stops 16-17. As clearly appears from Figure 1, the outersurface ofieach flange 19 as indicated at 21 becomes a stationary friction SllI'fElCGSO that the blocks A maybe said to constitute. combined friction members and compression resisting blocks.

On the outer side 'of each draft sill and cooperable with the corresponding. flange 19 of each block A, are two movable friction members designated generally bythe reference B. The members B are of like construction'and each consists of aninner flat plate like section or flange 22 adapted to slide back and forth on thestationary frietionsurface 21. Each block B is further formed with a substantially annular hollow cup 23 within which is adapted to be seated one end of a longitudinally arranged spring 24. On the back or outer end of eachcup 23 is formed a heavylug 25 to whichare pivotally connectedupper and lower links 26. and 27 ,by means of a heavy pivot pin'28,

the latter being heldagainst accidental loss by cotters or other suitable devices 29.

. The links 26 ,and..27 extend inwardly through slots 30.30 inthe flange22of the corresponding friction memher-B and also through suitable openings formed in the flange 19 of the corresponding member A. It will also be understood that the openings 18 in the draft sills are suitably cut to accommodate the links 26 and 27.

At their inner ends, the links 26 and 27, of which there are four sets as clearly appears in Figure 1, are pivotally connected to front and rear follower blocks C-C. Each of the blocks C-C, which are of like con struction, comprises a transversely extending wall 32 which acts as the follower proper to receive the pressure from the drawbar or the yoke, upper and lower webs 33-33 spaced apart a distance corresponding to the vertical height of the shanks 20 of the blocks A, and additional integrally formed upper and lower webs 34-434 spaced apart a distance corresponding to the vertical height of the shanks 20 plus the thickness of the two links 26 and 27 as clearly indicated in Figure 3. The links 26 and 27 are pivotally connected to the follower blocks CC by heavy pivot pins 35 which pass through suitable perforations in the blocks CC and also are accommodated in elongated slots 36 in the upper and lower walls of the shanks 20 of each of the blocks A-A.

From an inspection of Figure 1, it will be noted that the two front sets of links 26 and 27 are extended inwardly and at an inclination toward the rear or inner end of the draft rigging and the two rear sets of links 26 and 27 are inclined forwardly. The friction members or shoes B-B are normally in engagement with the stops 16 and 17 and spaced a distance apart corresponding to the permissible movement of the draft rigging. Similarly, the follower blocks CC are spaced apart a distance corresponding to the permissible movement of the gear and the same amount of movement is permitted be tween said follower blocks C-C and the fixed members A-A, as appears from an inspection of Figure 3.

The operation is as follows. Upon inward movement of the drawbar, the front follower C will be forced rearwardly which will pull or drag the two front sets of links 26 and 27 rearwardly. As the links 26 and 27 thus move rearwardly they drag the two front friction shoes BB in the same direction, which movement is yieldingly resisted by the springs 24. In addition, due to the angular position of the links, there" will be a heavy pressure generated between the friction shoes 13 and the stationary friction members A. The action will continue until the front set of shoes B and front follower C come in contact with the rear friction shoes B and rear follower block C, respectively. Upon removal of the drawbar pressure, the springs 24 will expand and the parts be projected back to normal position. Under draft, it is evident that the rear set of friction shoes B and rear follower block G will be moved forwardly and the front set of elements remain stationary. By changing the angularity of the links 26 and 27, it is evident that as great a pressure can be created between the movable friction shoes and the stationary friction members A. as desired and the effective resistance of the springs multiplied several times. In obtaining the great frictional pressure and resistance mentioned, it is evident that no buckling or bending strains are imposed upon the draft sills since the entire load, transversely of the sills, is taken by the members A-A,, which act as a compression resisting column.

Although we have herein shown and described what we now consider the preferred manner of carrying out the invention, the same is merely illustrative and we contemplate all changes and modifications that come within the scope of the claims appended hereto.

VVe claim:

1. In a draft rigging. the combination with draft sills having stops thereon, a drawbar. and yoke-acting means: of stationa ry friction elements disposed outside of the draft sills; movable friction elements cooperable with said stationary friction elements; spring means located on the outer sides of the sills associated with said movable friction elements; and means actuated upon movement of the draw bar and yokeacting means for moving said movable friction elements with respect to the stationary friction elements.

2. In a draft rigging, the combination with draft sills, dra-wbar, and yoke-acting means; of relatively stationary and movable cooperable friction elements located on the outer sides of said draft sills; means located between the sills adapted to be moved upon movement of the drawbar; means extending between said means located between the sills and the movable friction elements for actuating the latter; and spring means for restoring the parts to normal position after each actuation upon removal of the actuating force, said spring means being located on the outer sides of the sills.

3. In a railway draft rigging, the combination with draft sills; of frictionelements having longitudinally extending stationary friction surfaces disposed outside of the sills; longitudinally movable friction elements cooperable with said stationary friction elements; means for pulling said movable friction elements longitudinally and at the same time exerting an inwardly directed pressure against said stationary friction elements; and stationary means forming a compression resisting column extending transversely between said stationary friction elements to thereby relieve the sills of transverse bending strains.

4t. In a railway draft rigging, the combination with draft sills; of duplicate sets of friction devices on the outside of the draft sills, each set comprising a stationary friction element, a pair of movable friction ele' ments, and a spring resistance between the movable friction elements ;mcans located between the draft sills actuated from and movable longitudinally upon movement of the drawbar; and connections between said means and said movable friction elements for actuating the latter.

5. In a draft rigging, the combination with draft sills having stops thereon; of stationary friction members in engagement with said stops, each of said friction members having an outer friction surface extending parallel to the draft sills; a pair of movable friction elements slidingly mounted on each of said stationary friction surfaces; spring means interposed between the movable friction elements of each pair; followers disposed between the draft sills; and connections between each follower and corresponding pair of movable friction elements.

6. In a draft rig ing, the combination with draft sills having stops thereon; of a pair of blocks each having an outer flange disposed on the outside of the corresponding draft sills and provided with a shank extended through the draft sill, the blocks abutting each other between the sills, the flange having an outer stationary friction surface, the blocks being held against longitudinal movement by said stops; front and rear follower blocks; a pair of friction elements slidably mounted on the outside of each of said stationary blocks; a spring between the movable friction elements of each pair; and link connections between each movable friction element and corresponding adjacent follower block, said links being extended through the draft sills and at an angle thereto.

7. In a draft rigging, the combination with draft sills, a drawbar, and yoke-acting means; of twinarranged sets of friction devices, one on the outer side of each draft sill, each set of said friction devices including a stationary friction element, a movable friction element and a spring; and means operatively connecting said movable friction elements with the drawbar and yokeacting means.

8. In draft rigging, the combination with draft sills, drawbar, and yoke-acting means; of twin arranged sets of friction devices, one on the outer side of each draft sill, each set of said devices including a stationary friction element, front and rear movable friction elements, and a spring; and means operatively associating said movable friction elements with the drawbar and yokeacting means.

In witness that we claim the foregoing we have hereunto subscribed our names this 6th day of December, A. D. 1919.

WILLIAM H. MINER. JOHN F. OCONNOR.

Witness META SCHMIDT. 

